radv: remove VkPipelineCacheCreateInfo::flags assert

flags are handled, so this just crashes for no reason

Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7030>
diff --git a/src/amd/vulkan/radv_pipeline_cache.c b/src/amd/vulkan/radv_pipeline_cache.c
index a856349..d031129 100644
--- a/src/amd/vulkan/radv_pipeline_cache.c
+++ b/src/amd/vulkan/radv_pipeline_cache.c
@@ -511,7 +511,6 @@
 	struct radv_pipeline_cache *cache;
 
 	assert(pCreateInfo->sType == VK_STRUCTURE_TYPE_PIPELINE_CACHE_CREATE_INFO);
-	assert(pCreateInfo->flags == 0);
 
 	cache = vk_alloc2(&device->vk.alloc, pAllocator,
 			    sizeof(*cache), 8,